Menu: Extensions » SUbD » Quad Push/Pull Tool
SUbD provides a custom Push/Pull that attempt to preserve and produce quad-faces. Where the normal Push/Pull tool will stretch or create internal faces the SUbD Push/Pull will create new quads without internal faces.
Similar to the normal Push/Pull tool one can use the modifier key to force it to create new faces instead of moving the face. As always the SUbD version will not create internal faces.
Currently the SUbD Push/Pull tool isn't as stable as the normal one. This is something that is being worked on and improvements will come in later updates.